Physics
Scientific paper
Aug 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004sci...305.1277s&link_type=abstract
Science, Volume 305, Issue 5688, pp. 1277-1280 (2004).
Physics
24
Scientific paper
A deep earthquake swarm in late 2003 at Lake Tahoe, California (Richter magnitude < 2.2; depth of 29 to 33 kilometers), was coeval with a transient displacement of 6 millimeters horizontally outward from the swarm and 8 millimeters upward measured at global positioning system station Slide Mountain (SLID) 18 kilometers to the northeast. During the first 23 days of the swarm, hypocentral depths migrated at a rate of 2.4 millimeters per second up-dip along a 40-square-kilometer structure striking north 30° west and dipping 50° to the northeast. SLID's transient velocity of 20 millimeters per year implies a lower bound of 200 nanostrains per year (parts per billion per year) on local strain rates, an order of magnitude greater than the 1996 to 2003 regional rate. The geodetic displacement is too large to be explained by the elastic strain from the cumulative seismic moment of the sequence, suggesting an aseismic forcing mechanism. Aspects of the swarm and SLID displacements are consistent with lower-crustal magma injection under Lake Tahoe.
Anderson John G.
Blewitt Geoffrey
Davis James L.
Preston Leiph
Smith Kenneth D.
No associations
LandOfFree
Evidence for Deep Magma Injection Beneath Lake Tahoe, Nevada-California does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Evidence for Deep Magma Injection Beneath Lake Tahoe, Nevada-California, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence for Deep Magma Injection Beneath Lake Tahoe, Nevada-California will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1189639